Model B-4108 8 × 8 coaxial relay matrix has a frequency range of DC - 600 MHz. Impedance is 50 ohms (75 ohms optional). Transmission loss is – 1 dB at 100 MHz and – 3 dB at 600 MHz. Rise time is less than 1 nanosecond. The stand-alone unit requires TTL control and DC power. It features built in decoding and latching with interlock that prevents shorting of inputs. Model B-4108 also features crosspoint verification and is DC coupled with low through resistance.; (818) 222-2301